The cover of this pioneering volume of essays on auditory perception is a striking photograph of Sam Van Aken’s Thumper—a head-high, spherical geodesic lattice, studded with dozens of sub-woofer speakers. Connected to five, thousand-watt amplifiers, the metal sphere emanates a droning bass sound, which loops from angry physical insistence into silence and back again. Thumper is the cover of a manifesto. Too long have philosophers been obsessed with sight. Too long have they neglected the distinctive puzzles raised by non-visual modalities, and developed distorted vision-based models of the other senses. Thumper’s message is: listen up. Anyone interested in perceptual experience (or for that matter epistemology, metaphysics, or aesthetics) will have much to learn if they do.